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MA'TTHIAS MEAD,- OF LOWELL, MASSACHUSETTS.

Letters Patent No. 70,347, dated October 29, 1867. i

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TO ALL WHOM IT MAY CONCERN;

Be it known that LMATTHIAS MEAD, of Lowell, in the county of Middlesex, and State of Massachusetts,

- have invented new and useful improvements in Radiating Portable Furnaces; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon. p i

The nature of my inv ention consists in providing fora portable furnace a chamber in under the ash-box; in connection with a supply pipe through the floor, for the purposeof introducing foreign air.

It also relatesto the distributing of this foreign air, received into the chamber at the bottom, through conducting-holes, into the inner continuous vacuum, thence passing up and-down through the outer continuous vacuum into a conducting discharge pipe.

To enable others skilled inthe art to make and use my invention, I will proceed to describe its construction and operation.

Figure 1 representsa side elevation of my improved radiating portable furnace.

Figure 2 represents a vertical section of the same.

a represents the floor, b the supply pipe, c the chamber, d d the conducting holes, e the inner vacuum or flue, fthe outer vacuum or flue, gthe conducting discharge pipe, It the ire-box, and 2' the smoke pipe. 7 To secure and perpetuate health, the introduction of pure or foreign air into our houses is of the utmost importance, especially if it can be conducted instantly in any room or rooms required. By foreign air Imean air taken from any pure source or place, either from outside-of the building or from any room. or rooms in the house where the air is not impure. In my improved radiating portable furnace this desired. object is fully attained as follows:

'Jlhefire-box h in the furnace being sufiiciently supplied with ,wood or coal, and fired up, the smoke, gases,

or vapors pass oil out of the smoke pipe 2', the foreign air is draughted up through the conducting pipe 6, through the floor a, into the chamber c, under the ash-box y. It then passes through the conducting holes d 01 into the heated inner vacuum orflue e, thence up and down through the outer vacuumf, through the conducting pipe g, I into any desired room or rooms or apartments in the house, and, it will be seen in fig. 2, the arrows in the, flues e andfindicate thedirection of the heated air. In some 'casesit is desirable to retain all of the heated air in the room'where the furnace is located. When this occurs I dispense entirely with the conducting pipe g, and

perforate the outside case at the bottom with suitable holes, which conducts the heated air through these holes into the room. These holes are indicated in fig. 1 by red lines. p

Thus it will be seen by thisarrangement pure foreign air is heated and conducted into the room, and close down to the floor, constantly and continually supplying the room, driving of the impure air which may be gen- I erated'by the inmates. of the room, which aids the health and conduces to the comfort of those who occupy the same. Besides, other rooms in any part of the house can be'furnished with this pure heated element, to any degree of heat desired, with the same furnace; all of these advantages resulting in the saving of fuel, the

expense of extra stoves, and above all, and more than all, the preservation of health.

What I claim as my invention, and desire to secure by Letters Patent,'is-- I claim the arrangement of the continuous vacuum or fines e and f, for the purpose of heatingforeign air and distributing it into any room or rooms, substantiallyasdescribed, and as herein specified.

' V MATTHIAS MEAD.

Witnesses:

Gno. E. PEVEY, ARIEL Pnvnr. 

